The act or manner of moving smoothly, swiftly, and without labor or obstruction.(noun)

source: webster1913

Movement of a glider, aëroplane, etc., through the air under gravity or its own movement.(noun)

source: webster1913

verb (v)

move smoothly and effortlessly(verb.motion)

source: wordnet30

fly in or as if in a glider plane(verb.motion)

source: wordnet30

cause to move or pass silently, smoothly, or imperceptibly(verb.motion)

source: wordnet30

To move gently and smoothly; to pass along without noise, violence, or apparent effort; to pass rapidly and easily, or with a smooth, silent motion, as a river in its channel, a bird in the air, a skater over ice.(verb)

source: webster1913

To move through the air by virtue of gravity or momentum; to volplane.(verb)